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JOHN R1. WOO-D, OF NETWRK, NEW" JERSEY', ASSIGNOR T0 .NEW PROCESS MULTI-GAST- INGS COEPNY, Oli NEWRK, .NEVI JERSEY, A. CORPORATION 0F NEW' JERSEY.

HOLDING.

Application :led May 2% 1922. Serial No. 563,278.

To all whom t may concern:

Be it known that l, JOHN B. Vfoon, a citizen of the United States of America, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Molding, of which the following is a full, clear,and exact description.

This invention is an improvement in the art of molding or casting objects of metal in sand or other molds. .consists in a novel process or method of producing what are known as metal matched pattern plates by means olfwhich the cope and the drag sections or members of an ordinary mold may be made. rlhe process of molding metal parts may be most expeditiously and eco nomically carried out by the use ci such matched plates instead of by means of the ordinary patterns which have to be drawn from each mold, but the obstacles to their use are numerous, particularly the diculty of making them, which, up to the present time, is a practically unsolved problem from a commercial stand oint. The present invention, however, a ords a quick and easy means of making suoli plates in a perfectly satisfactory condition.

rlhe method of producing these matched plates hereinafter described is novel so tar as its general character is concerned, and the specific details involved are not of the essence et the invention, as these may be greatly modified, as will be understood by those skilled in the art. ln general terms, the new process is as stated below.

l first form two follow boards, a drag and a cope follow board, 4and upon the former is 'laid a pattern or the object to be cast or molded. lt any special follow boarding be required to back out the pattern, or in other words, to till out the hollows or concavities on the under side of the pattern, this is done the usual way by attaching to the drag follow board a suitably shaped-block ofy wood, although it is sometimes desirable and convenient to form this backing by running into the pattern a composition composed ci finely divided carbon, plaster oi Paris and sawdust made sufficiently liuid for the purpose and permitted toset, or this composition made as a plastic may be molded into the back or the pattern and allowed to' harden andthen withdrawn.

The cope follow board may also be formed in the usual way by hollowing out a block oi wood attached to the cope follow board, or it may be formed by placing on the drag follow board with its pattern side bars or boards to form an enclosing trame, and lilling in this frame with the saine plastic composition which when set is lifted out and attached to the cope follow board.

llaving now my two follow boards, l proceed as follows: The drag follow board with the pattern laid thereon is made the bottom of a mold which is packed in the usual manner with sand. rlhe follow board is then removed and the perfect sand mold containing the pattern is then inverted and made the lower section of a two-part liask with closed bottom but open top. The empty upper section is then packed with sand in the usual manner, a board secured over the open top, the two sections of the flask drawn apart, and the pattern removed from the drag section.`

l then place this drag section with the impression of the pattern thereon over the drag follow board with its wood or plastic backing, but separate the two by strips of a fusible metal laid along their sides and secured to the drag follow board. rlhis forms a mold which is turned upon its side or end and poured with Babbitt or white metal. By this means the space Within the mold is completely lilled with n metal which fuses the edges of the metal strip so that these are united to and become an integral part of the pattern plate formed by this operation.

l then do the same thing with the cope mold and cope follow board; that is to say, the two are brought together and properly secured with fusible metal strips of the saine thickness laid along their sides and secured tothe cope follow board. This mold is then turned on endy and poured in the same Way, and the cope board then removed.

There are thus produced a drag follow board and a cope follow board. Each with a perfectly matched pattern plate secured thereto which may be used in the usual and ordinary way in making molds. That they are perfectly matched follows from the fact that they are made from the same pattern in a single mold, and the process of producing them precludes any such unevenness, irregularities and diierences as are inevitably i found to exist between matched plates made in any kother known way.

,i g to the seine: is sectionel View of the dre low boord with e beclred putt i n ig. 2 is sectional View of ie esso cope one. drag 'follow bod, showing tl tern ii. place end the l -lesti i teriel on its opposite sioes.

3 is e. section-nl vien' o n s n L i u n eu ion societes with ne o...

and ge'lterr n.2

i nrt or ilaslr member oi wit a J vh the cope fellow board oi J the Yhisible strips interposet.

and secured to the coge 7isesii-`fi with the L' ""\"n remove seme Way wifi the di li its plastic backing. rio'. 8 is s sectional View of the or comple e t te ched meto ied pl end i T.. x.: n il 9 e. s rnler view oi die diag rollo attached matched plete board and its The nuniernl desi bitching 'for the pattern.

sand fillingA oin lthe 1 Figs. ne coveru posts of the issli sections id il Lhe usuel devices for joinin tivo fissi sections together. ln Fi 's the completed metal matched pntteii tnched to the cope 'follow board, and in i 9, 1S is the conr plete inetel metehed nettern plete attached to the drag' follow board. ln 6 und Y, 17 are the fusible metal strips.

As indicated above the oroeess ons been described in its preferred iorrn. ing it out other materiels than those named7 end other known Ways of obtaining impressions and castings muy be employed, but as n Whole the process is broedly ne.. Lor the purpose set forth.

What claim is:

1. The method of makingnictal matchs pettern plates herein described, which oonsists in forming cone end drag follow boards in carryc of the opposite sides ot Y in :i herd nnrl'eriel, mal;- molds ith impressions oit the opl oi" the seme pattern. and by the saine associated with but the corresponding 'follow attached i send mold members ased from the correds to torni molds, .eitern plates ot releof molding matched petein described, Which consists ie mold theretor with sides of i is fused by that poured into become the edges and en pla-te molded.

making matched pet tern plates hereii described, which consists in zissociarting` tne two members of e iaslr to torni e. mold therefor and separating the seid two members by strips of fusible metal which forni the sides o1 the niold space to be hlled, and `which become united to end ntegral with the plete when molded.

. The method of marking metal matched pnttern plates comprising the following steps, forming s drag follow board With a pnttni thereon with a follow boarding or of z1- lmrd materiel. forming 'from lerice n cope follow board with the impressi ns therein, forming troni the same device with the pattern thereon an impression in rammed sand, vibrniingcr from this impression With the pattern in it n. rammed send impressiony and forming;` with these impressions and the aforesaid tollen7 boards molds Jfor the pattern plates.

6. The method set forth in claim with the additional steps of seoernting the two members used to Jiorin the molds by fusible instel strips, and securing seid strips to the follow boer-ds. whereby they will become 'nsed by end integral with the metal poured to forni the i lates.

n testimony Whereorl hereto my signature.

SGEN R. WOOD 

